Patients will assume a prone lying position. The legs of the operated limb will be positioned in a neutral rotation and will be allowed to hang freely, over the edge of the bed, by the weight of leg and apparatus as well as by the pulling effect of the gravity. This position will be maintained for duration ranges from 1 minute to as long as tolerated by every individual patient. Patients will also be instructed to assume this position frequently at home during some daily activities e.g. while watching television or reading a book.